Machine for stripping sheet metal



Dec. 25, 1951 J. s. PIcToN MACHINES FOR STRIPPING SHEET METAL Filed Juiy 5, 195o .5 Sheets-Sheet l FGM.

M AC-ENTS Dec. 25, 1951 J. B. Plc-ron: 2,579,700

MACHINES FOR STRIPPING SHEET METAL mvEN-ro? @M617 @ma w Mmmm Qin AQ-ENTS DEG 25, 1951 J. B. Plc-roh: 2,579,700

MACHINES FOR STRIPPING SHEET METAL Filed July 5, 1950 3 Sheets-Sheet 3 a" Lv@ el 'ACnEN-r s Patented Dec. 25, 1951 2,579,700 MACHINE FOR STR'IPPING SHEET METAL JohrirBurley Picton, Wolverhampton, England, assignor to Joshua Bigwood ,arid,Son, Limited,l Wolverhampton, England, a British company Appiicatioii'ruiy 5, 1950, serial No. 172,101f In Great Britain July 11, 1949 'zr claims. (c1. 24a-si) This invention relates `to machines of' the kind in which the sheet usually inthe form of a coil, has its leading en'd engaged with a winding drum and is drawn through slitting tools which cut it into strips which are wound on the drumto form a plurality of individual` coils disposed on the drum in side-by-side relationship.

In machines of this kind'it is the usual practicewhen the strips'have been coiledon the drum to bind the turns of each coil together `while the coils are still on the drum to prevent them from unwinding. This practice necessitates leaving the coils on the drum while they are being bound, an operation which occupies a considerable time, and the primary object of the present invention is to provide means whereby the coils may be removed from'the drumbefore they are bound so as to leave thedrumfree to receive the next slit coil.

`According to' the' present invention, I provide a `carriage mounted for movement parallel with the axis ofthe drum, the carriage having a body with an opening of' approximately C`shapeA adaptedto be moved over the coils on the drum and 'the body "being provided for each severed coil with one or `more inwardly movable gripping members whereby theccils can be prevented from unwinding when their ends leave'the slitting tools, or other apparatus such as Yrollers the arrangement being such that the carriage can be moved' to bring the body into a position inwhich it ex-` tends partiallyaroundthe slit coils on the drum and the grippingmember or members operated to engage thecoils thereon, after which the coils canbeoperated'on by a pusher so as to push them .Y axially off the drum and to move` the carriage axially so as toleave the drum clear for dealing' with thenextcoil, the turns of the coils, now

held in the body, being bound together by suitable means and the coils being then removed from thebody.

The carriage which supports the body may be mounted on wheeis-whichmayrun upon rails disposed parallel to the axis of the drum and means may be provided on the carriage for driving the supporting wheels for moving the carriage into` the position in which thebody is dispcsed'partially aroundthedrum.

The body maybe provided with three grippers which are spaced angularly around the'axis and which are disposed approximately radially thereto. These grippers` may be angularly spaced around the `axis so thatthey subtend an'Y angle of more than 180'?. y

Each gripper may be operated by a piston and cylinder actuated by pressure iiuid fromthe same source and the bore of the middle cylinder may be somewhat lessthan the other two.

The pressure of the operating iiuid may be controlled by means of a pump and regulated by means of valves.

The invention is illustrated in the accompanying drawings, wherein:

Figure l is a plan view.

Figure 2 is an end view.

Figure 3 is a side view.

,Figure 4 is an enlarged section on linev 4 4` of Figure 2.

Figure 5 "is asection on line 5 5 of Figure 4.

Figure 6 isa section` on line Y6 6 of Figure 4.

In the construction illustrated the machine comprises a carriage having a frame I0 provided with a pair Vof supporting wheels ll at each side. Each side ofthe framev may be formed by two channel-section members l2 placed with the Webs verticalJ and arranged side-by-side. These channels areprovidedwith bearing blocks i3 in which the axles llt` of the supporting wheels, which may be of the flanged railway type, are mounted. Rails l5` are provided on which the carriage can be runrand these rails are parallel to the axis of the winding drum I6.`

The carriage supports a body Il which incorporates a pair of spaced plates i8 of approximately C-sha'pe which are secured to spacing blocks I9".` When the carriage is moved along'V its rails the body` ll partly encircles the coils 2Q which have been wound. or which are being wound onthe winding drum I6 of themachine.

l Theinner edge ofthe body extends around rather more than one 'half of the peripheries of the coils but it is spaced therefrom. The gap between the ends 2l, 22.` of theV body is sufficiently large to enable the coils 2i? to be liftedv out of the body by means Oflifting' gearand the gap is disposed atV the upperpart Of one side.

The lspacing members i9 of the body are provided with radial openings in which are fixed` three spaced cylinders 23 containing pistons 24.

` Each o'f the cylinders 23 is provided with an exterior'ii'ange 25 'which .is attached to aspacing member i9. Each cylinder` at its outer end pro jects from thebddy iTbut its inner end is housed The outer end of each cylinder is closed by` a plate 26 to which a pipe 2'! is connected sd that pressure fluid can be admitted to the cylinder. Each cylinder is further provided withfa passage 23 in the thickness ,of its wall to which passage pressure fluid can be admitted through a pipe 29. The admission and exhaust of pressure iiud through the pipes 21 and 29 is controlled by a valve of known construction which is not shown in the drawings. Each of these cylinders 23 contains a piston 30 to which is connected a piston rod 3I extending through a gland 32 and the inner end of the piston rod is provided with a groove 33 engaged by a two part collar 34 attached to a sliding block 35. These blocks 35 are provided each with two pairs of shoulders 36 which are guided on facings 31 on the members I8. These facings are formed at the edges of radial slots 38 in the members I8. The edges 39 of these slots also assist in guiding the blocks 35. The inner end of each piston rod 3| is formed as a head 40 which is mounted in a recess 4I in one of the sliding blocks 35. Each sliding block at its inner end is provided with a dove-tail slot 42 extending parallel to the axis of the winding drum I6. Mounted in this slot are a number of finger plates 43 having dove-tail portions 44 and arranged side-by-side. Attached to the front and back faces 45 of each sliding block 35 is a plate 46. These plates being attached by screws 41. The finger plates 43 are clamped between the plates 46 by means of screws 48 on which are lock nuts 49. Distance plates 50 are provided between the inner faces of the plates 46 and the adjacent face of each outer finger plate. The finger plates 43 are shouldered at opposite sides so that their inner portions 45a are spaced apart axially while their outer portions 44 are in contact.

At their inner ends the finger plates are slotted axially at 46 so that each can receive at its inner end a wearing block 4l of relatively soft material,

such, for instance, as wood or plastics material, the arrangement being such that these wearing blocks are adapted to be forced into contact with the outer turn of a coil.

The wearing blocks are shouldered at 48 and provided with ribs 49 at their outer sides which engage in the slots 46 in the finger plates and they are retained in position, each on a finger plate, by means of two screws 50.

A supply of pressure iluid is provided and this may be oil or other liquid or compressed air, the pressure being maintained by a pump and valves being provided so that admission of pressure fluid to the outer ends of the cylinders can be controlled and exhaust provided for when it is Ydesired to release the pressure on the coils produced by the wearing blocks.

The three cylinders are spaced apart angularly around the axis and together they subtend an angle of more than 180 and the middle one of the three cylinders may be of somewhat smaller diameter than the other two.

Spaced rings I may be placed on the winding drum I6 between the coils and after the coils are pushed off the winding drum these spacer rings may be removed by moving them at right angles. to the axis. Before the coils are pushed ol the winding drum, the pressure uid is admitted to the cylinders which control the gripping members causing the wearing blocks to move into contact with the outer periphery of each coil so as to prevent it from springing open.

The grippers are caused to grip the coils while the body is still in position over the winding drum and when this stage has been reached, the coils are pushed off the winding drum by the usual pusher causing the carriage Il) to move along its rails I5. As soon as the coils leave the winding drum the spacer rings can be removed. Whenthe coils have been pushed ol the winding drum and the carriage moved away therefrom the winding drum I6 is left clear for a further winding operation and the turns of the coils now in the body can be bound or tied by means of clips or wire while they are in the body after which the gripper members can be released and the coils removed from the body.

What I claim then is:

l. A machine for removing coils of material from a winding drum, comprising a body of approximately C shape, said body being movable parallel to the axis of the drum, and power operated gripping means in the body for gripping the exterior of the coils, said gripping means being retractable to allow the coils to be removed from the body.

2. A machine for removing coils of material from a winding drum, comprising a carriage movable on rails parallel to the axis of the winding drum, a body of approximately C shape on said carriage so that the body can be moved from a position in which it partially encircles the winding drum to a position in which it is spaced from the end of the winding drum, and power operated gripping means in the body for gripping the exterior of the coils, whereby the coils can be gripped and withdrawn from the winding drum while held in the body, said gripping means being retractable to allow the coils to be removed from the body.

3. A machine for removing coils of material from a winding drum, comprising a body of approximately C shape, said body being movable parallel to the axis of the drum, a plurality of substantially radial cylinders in said body, said cylinders collectively subtending an angle greater than around the axis of the winding drum, pistons in said cylinders, and piston rods connected to said pistons, said piston rods being each connected to a radially sliding block, carrying gripping means for the coil.

4. A machine for removing coils of material from a winding drum, comprising a body of approximately C shape, said body being movable parallel to the axis of the drum, a plurality of substantially radial cylinders in said body, pistons in said cylinders, and piston rods connected to said pistons, said piston rods being each connected to a radially sliding block, guiding means on the body for each of said sliding blocks, and a plurality of nger plates disposed side by side along the axial length of each block, said inger plates being clamped to said blocks.

5. A machine for removing coils of material from a winding drum, comprising a body of approximatelyC shape, said body being movable parallel to the axis of the drum, a plurality of vsubstantially radial cylinders in said body, said cylinders collectively subtending an angle greater than 180 around the axis of the winding drum, pistons in said cylinders, and piston rods connected to said pistons, said piston rods being each connected to a radially sliding block, guiding means on the body for each of said sliding blocks and a plurality of nger plates disposed side by side along the axial length of each block, said finger plates being clamped to said blocks, and having their outer portions thicker than their inner portions, whereby the latter are spaced apart to permit of the use of spacing rings on the winding drum between the slit coils.

6. A machine for removing coils of material from a winding drum, comprising a body of approximately C shape, said body being movable parallel to the axis of the drum. a plurality of substantially radial cylinders in said body, pistons in said cylinders., and piston rods connected to said pistons, said `piston rods being each connected to radially sliding blocks, guiding means on the body for each of said sliding blocks, and a plurality of nger plates disposed side by side along the axial length of each block, said linger plates being clamped to said blocks, and wearing blocks secured to the ends of said nger plates.

7. The combination of a Winding drum for winding side by side coils of metal separated by slits and a machine for removing the coils from. the drum, the machine comprising. a carriage movable on rails parallel to the axis of the winding drum, a body of approximately C shape on said carriage so that the body can be moved from a position in which it partially encircles the wind- 6 ing drum to a position in which itis spaced from the end of the winding drum, and power operated gripping means in the body for gripping the exterior of the coils, whereby the coils can be gripped and withdrawn from the winding drum while held in the body.

J OHN BURLEY PICTON.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 2,249,379 Ford et al July 15, 1941 2,268,125 Nash et al. Dec. 30, 1941 

